I am one of those lucky So Cal people who gets to have a hill in my backyard.  I think of it more as a cliff than a hill but whatever.  And since we live close to the coast our hill is made up of sandy soil and grapefruit to soccer ball size rocks.  The rain of the weekend was the final straw for the poor hill.  We heard a huge bang the other day that sounded like someone dropping a huge stack of wood.  Go out back to find one of the soccer ball rocks had come out, tumbling down, knocking over a tree and knocking out a glued in block from our retaining wall.  Not cool.................